Development of Compton Radiography Diagnostics for Inertial Confinement Fusion Implosions

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An important diagnostic tool for inertial confinement fusion will be time-resolved radiographic imaging of the dense cold fuel surrounding the hot spot. The measurement technique is based on point-projection radiography at photon energies from 60-200 keV where the Compton effect is the dominant contributor to the opacity of the fuel or pusher. We have successfully applied this novel Compton Radiography technique to the study of the final compression of directly driven plastic capsules at the OMEGA facility. The radiographs have a spatial and temporal resolution of {approx}10 {micro}m and {approx}10ps, respectively. A statistical accuracy of {approx}0.5% in transmission per resolution ... continued below

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Tommasini, R; Hatchett, S P; Hey, D S; Izumi, N; Koch, J A; Landen, O L et al. November 16, 2010.

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An important diagnostic tool for inertial confinement fusion will be time-resolved radiographic imaging of the dense cold fuel surrounding the hot spot. The measurement technique is based on point-projection radiography at photon energies from 60-200 keV where the Compton effect is the dominant contributor to the opacity of the fuel or pusher. We have successfully applied this novel Compton Radiography technique to the study of the final compression of directly driven plastic capsules at the OMEGA facility. The radiographs have a spatial and temporal resolution of {approx}10 {micro}m and {approx}10ps, respectively. A statistical accuracy of {approx}0.5% in transmission per resolution element is achieved, allowing localized measurements of areal mass densities to 7% accuracy. The experimental results show 3D non-uniformities and lower than 1D expected areal densities attributed to drive asymmetries and hydroinstabilities.

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PDF-file: 25 pages; size: 1.4 Mbytes

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  • Journal Name: Physics of Plasmas, vol. 18, no. 5, May 19, 2011, pp. 056309; Journal Volume: 18; Journal Issue: 5

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  • Report No.: LLNL-JRNL-462711
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 1016984
  • Archival Resource Key: ark:/67531/metadc839597

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  • November 16, 2010

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  • May 19, 2016, 3:16 p.m.

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  • Dec. 5, 2016, 2:14 p.m.

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Tommasini, R; Hatchett, S P; Hey, D S; Izumi, N; Koch, J A; Landen, O L et al. Development of Compton Radiography Diagnostics for Inertial Confinement Fusion Implosions, article, November 16, 2010; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc839597/: accessed November 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.